dont waste your time with a level bump hack. you can get to lvl 24 in less than 2 hours by playing with ‘/players 8’ (theres a note on an item in your starting inventory)
honestly the game is alot of fun, CHALLENGING (zomg a challenging game? havent seen one of those in years) and free.
be sure to visit the main site for info on how to play (you will need help by the time you hit act 3, maybe sooner) they have character build guides and fairly friendly people on the forums. (just be sure to look in the basic documentation for answers first, its only polite)